US1686202A - Magnetic-lock-operating device - Google Patents

Description

Oct. 2, 192s. 1 686 202 C. W. CHERRY MAGNETIC LOCK OPERATING DEVICE Filed July 27, 1925 Patented Oct. Y2*, 192g.

uN1TEu^srATEs- Matz CARL W. oHnRRYjoF SAN FRANCISCO, CALIFORNIA.I

MAGNETIC-LOCK-OPERATING DEVICE.

Application led July 27, 1925. .Seral'Noi 46,429.

. This invention relates tomagnetic locks in general and 1n particular to such magnetic locks as shown in thehome savings bank, for i which I have a copending patent application tiled July 27, 1925, under Serial No; 46,428.V vThe principal object the invention here# underis 'to provide a special magnetic 'key forunlocking and -lockingyhome vsavings banks, suchkey to be in the custody ot the banking institution issuing the small home Asavings banks so that the institution only will Figure 2 is a perspective view of the comremove the acplete magnetic lock operating device with the bank dotted in position above it; Y

Figure 3 is an end view of the bank in position on the extended poles of the electromagnet with the concealed bolts dotted in operative relation to the poles, and in unlocked position; and

Figure 4 is an enlarged vertical section of the Contact switch for completing the electrical circuit through the magnet windings.

The bank 1 is fully described in my cepending application referred to, and thereforewill only be sufficiently described herein to show the operativeness ofthe. magnetic lock operating device ot which this is a specification.

Figure 1 shows the bank asa bowl shaped receptacle 1 closed with a ilathead or plate 2 having a hinged door 3 and a coin slot el.

The door is preferably spring actuated so as to fly open whenunlocked vand is locked when closed by sliding iron or steel bolts 5 thrown inward by springs G all concealed below the plate 2 permanently secured to thel shell of the bowl, and is only unlocked by magnetic influence applied at the proper points at opposite sides of the shell by the special electroma gnet 7 shown in Figure 2.

y This electromagnet has upwardly extending pole pieces 8 with inwardly confronting curved :faces 9 againstwhich the rim of the bank is placed when it is desired to unlock the same, a brass guard plate 10 extending from pole to pole braces them and functions as a stop to the flat end of the bank when the bank is placedagainst the poles as shown in dotted lines in F igurefl, or full lines in F i gure 3.

`The bank being round, it must be revolved. until the door Ydista-nds vertical v*with respect tothe magnet 7 so as to bring the pole piecesv .directly in line with the endsl of the bolts 5.

The shell ofthe bankandslidable mount*- of the'bolts is preferably offbrass or other non-'magnetic material so that the-bolts 4will residual magnetism, and Vupon energizing vthe magnet the bolts are both drawn outwardly to the limits of; travel, as indicated in Figure 3,7thusunbolting the door and nnakig,r it free' to y open. n d i To energize the magnet it is proposed to complete the electric circuit bypressing on a switch 11 with the rear end of the bank after vrevolving it to the correct position as mentioned.

This switch 11 is positioned so that it comes directly under the end of the bank as indi' cated in Figure 1 so that upon pressing down` ward onl the rear end of the bank the switch will alsor be depressed to com lete the circuit not have aftendencyto be impeded through from the lead wires 12 an 12. delivering alternating current from the ordinary light socket.

The switch and magnet .are preferably mounted on a pair of insulating bases 13-18 with the wiring to the magnet concealed between them, and the dotted extensions 12 and 12 of the electric leads show the suby panel path of the current to theterminals 14e-14C respectively of the magnet windings. A

In Figure 4 the construction of the switch is seen to be a metal rod 15 vertically slidable in an insulating sleeveV 16 secured to the blocks 17 in turn secured to the base 13, and adapted upon being `depressed to contact a terminal 18vconnected to the lead 12 extending under the base from binding post 19 connected'to lead .12', f i

, The switch is normally open, however, by I a pair of wire springs 20 engaging ametal cross bar 21 secured to a flattened' side of the yrod 15 and active to urge the rod in an upward direction.

` These springs form a path for the, current from the rod 15 after same contacts the terminal 118 and lead the current to the screw 22 which secures the springs to the base, and through whichscrew the current Jfollows the sub panel Wire 12 to the magnet coil termi- 7 nal 14.-.

12-12 connected to the light socket, no en-,

ergy flows througlithe magnet coils until the 1 bank is lplaced in position and the rear end depressed to force down the switch which inimediatel energizcs they magnet Witliithe Aresultoft e powerful magnetic attraction .in-

'stant-lj7 pulling out both'b'olts against the tension'lof s rings 6 to theI positionindicated `Figure 3, thus allowing the doorv to s ring open, or when the bolts are thus Witlr'rawn rent broken to permit the bolts the door if open may' be closed and cury to snap in- Ward-ly and locky the door. A

In contemplating the invention as above described, Ait will be evident that many Vchanges inthe form of' switch and arrange mentof wiring, etc., may be made- Without departing'romthe spiritof `the invention; l

and any such are intended to be embraced in the appended claims.

I claim:

1.v A magnetic-lock operating device coniprising a support for carrying a'V bank having .a curved Wall, a portion of said support to contact Withsaid curvedvyall and to conformY therewith, magnets carried by said support and being. positioned so as to lie opposite magnetic bolts carried by a bank when the bank is disposed place and means for energizing said magnets.

QA magnetic-lock operating device com-k prising a support for carrying a bank having a curved wall, a portion of said support to contact With'said curved Wall and to; conform I therewith, magnets'rcarriedby support" and being positionedso as to lie opposite magnetic'bolts carried by a bank when the bank is disposedy in place andmeans `for energizing said magnets, saidmeans compris ing aA switch in electric connection With said magnets and with asource of" current, said switch being Vactuated by the vvhen the bank is disposed position.'y

CARL W.l CHERRY.

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